Pipe-cutter.



J. B. SMITH.

PIPE CUTTER.

APPLICATION IILBD DEC. 24, 1910.

Patented Mar. 19, 1912.

45 which is shown.

JAMES B. SMITH, OF MECHANICSVILLE, NEW YORK.

PIPE-CUTTER.

Specification of Letters Patent.

Patented Mar. 19, 1912.

Application filed December 24, 1910. Serial No. 599,148.

State of New York, have invented certain new and useful Improvements inPipe- Cutters, of which the following is a specification.

This invention relates to pipe cutters.

The present invention has for its object the provision of a simple,strong, durable, pipe cutter having a head and cutter-carrying linksconstructed and arranged in a novel fashion whereby the cutter may bereadily adjusted to adapt it to pipes of different sizes; and, further,to provide novel spring tensioning means whereby as the cut becomesdeeper, the tension on the cutters may be regulated and by which thetension will always be cushioned to compensate for all unevenness whichmay be found in tubes of uneven formation so that the cutting orshearing wheels may readily accommodate themselves to all conditionswithout injury to the pipe or to the tool.

The foregoing objects are accomplished by the provision of a pipe cutterof novel construction, such as set forth hereinafter and recited in theappended claim.

In the accompanying drawings :-Figure 1 is a side elevation, the handlebeing ,broken off; Fig. 2, a vertical section with the tensioning devicein full lines, taken on line 2-2 of Fig. 1; Fig. 3, a section on line3-3 of Fig. 1; and Fig. 4, a detail perspective of the last link.

The head 1 is provided with a socket 2 into which a suitable handle 3,tubular or solid, may be screwed, said handle being of sufficient lengthto give the proper leverage. One end of the head 1 is provided with acup or socket 1 and the other end is bifurcated and provided with twoprojecting shouldered parts or ears 5, only one of Certain of thecutters 6 are carried by the head 1. To strengthen the ears 5 curvedribs 7 may be provided on said ears. The remaining cutters 8 are carriedby double links 9, being located between the members of said links and journaled thereto by the trunnions 10. The members of the respectivelinks are connected by pins 11 at the opposite ends thereof and these inturn are connected to joints or knuckles 12 thereby constituting anarticulated structure. The trunnions 10 of all of the cutters 8, projectfrom opposite sides of the links so that they will be adapted to rest onthe shouldered ears 5, the links being of suitable width to pass snuglyyet easily in between said ears. The pivots 11 are flush with the sidesof the links. The last link 9 is of the form shown in Fig. 4t, said linkhaving no cutter, but in substitution therefor being provided with aspacer 8 whose ends are shown at 10. This link is provided withpreferably two sets of projecting studs 10 which are adapted to rest onthe ears 5 just as do the trunnions 10. To the last pivot 11 there isconnected a screw-threaded bolt 12 which is flattened so that it willnot turn. This bolt carries a hand nut 13 which bears upon a heavy coilspring 1 1 surrounding the bolt and seated in the socket 4.

Having initially inserted between the ears 5 such one of the links aswill take up the slack and cause the cutters to substantially bearagainst the pipe or tube to be cut, the trunnions 10 or the studs 10, asthe case may be, resting on the ears, the hand wheel 13 is then turnedto draw the cutters snugly against the pipe or tube. The handle 3 isthen reciprocated and the cutters make the initial cut. The hand wheel13 is then screwed down tighter and the cut is made deeper, and thisoperation is repeated until the tube or pipe is cut through. If the tubeor pipe is irregular or any unevenness presents itself to the cutters,the spring 14: yields and prevents injury to either the tube or pipe orto the tool.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

In a pipe cutter, the combination with a head and handle. said headhaving a bifurcated part, of a chain of cutters, the links of which areadapted for reception in the bifurcated part and have projectionsadapted to be engaged with the head at the bifurcated part thereof, thuspermitting quick attachment thereto or detachment therefrom, ascrew-threaded bolt connected to the other end of the series of cuttersand passing loosely through the head, an adjusting nut or wheel engagedwith the screw threads on said bolt, and a coil spring interposedbetween the nut or wheel and the head, the bolt permanently connectingthe In testimony whereof, I hereunto affix cutters to the head, theseries of cutters bemy signature in presence of two Witnesses.

ing adapted to be quickly opened out to surround thepipe andsubstantially ini- JAMES SMITH tially adjusted and thereafter broughtinto Witnesses:

firm contact with the pipe by turning the M. L. WELLING, nut or handwheel. 7 STEPHEN LEE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, I). C.

